Apparatus for the driving of a pattern mechanism or shed-forming machine



July 17, 1928. 1,677,255

'H. STAUBL| APPARATUS FOR THE DRIVING OF A PATTERN MECHANISM OR SHED FORMING MACHINE "Fil'ed Feb. 4, 1927 7" T- 2 {DJ/ 106 4 a V M Or Kmzes I 5 ,cumstances of which comprises a Patented July 17, 1928.

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Heep STEUBLI, or Zoruon, swir'znnlmnn, ass'rernon"'r-o *GE-BB. semen &ioo., bjr

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arraaarus roe THE naivin'e or a rairrna'n fiaECHANISM on SHED-roma ne Macrame.

-Applicationfiledciehruary i, 1927, Serial No. 165,978, and in Switzerland May 18,,1926. I

The present inventionirela-tes to apparatus for the driving of a-pattern mechanism or shed forming machine according to the cir- 7 at will either by hand or 1nechanically. ,The possibility of driving furnishes the weaver withthc advantage of being able to rotate the shed forming or pattern mechanism, with the pattern-card cylinder,v forwards or backwards at will when finding a broken weft or during return weaving, without also having to rotate the loom backwards or forwards at the same time. 7 I I, 1

One constructional example of the invention is illustrated in the accompanying drawing in front elevation in Figure land in side'elevation in Figure'Q. j

1 is the shaitwhich, by means or the cams 2, drives the liftingknives (not shown) of the dobby, andwhich carries at one end a bevel wheel 1, with which there meshes a bevel wheel '5 mounted 6 driven by the 'upper loom shaft in the ratio of 1: 1. Jpon the other end 10f the shaft 1 is fixedly mounted a spur wheel 7, with which a spur wheel 8, half as large in diameter, can mesh, which is mounted loose upon a stationary pivot 9 and is axiall slidable thereon. For the rotating and slidupon the pivot 9, there serves a hand-crank 10, which is screwed or cast-on to the wheel hub. In order to limit the sliding, the pivot 9 contains two v.peripheral grooves 11, in which a .pin 12 can engage, which is carried by a presser lever 13 subject to spring I pressure, supported upon the hub of the wheel. In a peripheral groove in the hub of the spur wheel 8 there is loosely mounted a rod 14;,svhich is bent at right angles at the bottom, directed parallel to the pivot 9 and guided in a bearing 30'and at theother end carries a link member 15. The latter is connected by a pin 16 with a bell-crank lever- 17 the other arm toothedfsector 18, which meshes with atoothed segment of a double lever 19 which is rotatable about a pivot '20. The other arm of the double lever 19 embraces with a fork a pin 21, which is located onone arm of a bell-crank lever 22, oscillating about a stationary pivot 23, the other arm 01": the bell-crank ing connected to a fork 24. The latter serves for the axial displacement ofa clutch merning of this wheel ,8

this hand bevel. wheel 5, which loose upon a, shattmeshes with the latter.

lever 22 bei ber and 29, one at each end. By, meansof one of these claws 28, it 'eanbe coupled to the hasa corresponding end claw, whilethe other, higher claw 29 of the member'25 serves the latteras apermancnt guide on a claw member 26 mounted fast on the shatt 6, for'thepurpose'ot preventing the clutch member 25 from rotating upon the shaft 6. v Betweenthe two'claw members 25 and 26 is inserted a compression spring 27 which tends to press the former against the bevel wheel 5,-andkeeps itinengage ment with the latter during normal working.

The drawing shows driving apparatus in the position in which "the loom and the dobby, that is to say, the shattso and 1,

are coupled to one another by the wheels 5 and 4 and the claw The spurwheels 7 and 8 on -the=otherhand are out of engagement with one another. It the dobby is to be disengaged from the loom when this latter is stopped the vpin 12 is disengagedfrom the right-hand groove 11 in Figure 2 by pressing with the finger upon the outer end of the pressure lever 13,,

and the wheel 8 is pulled by meansof the hand-crank 10 against the wheel 7 and Thissposition-is secured by the pin 12 snapping into the outer groove 11. By the displacement of the wheel 8, the rod 14: has rotatedthe lever 17 and the latter, by means of its toothed segment 18 has'rotated the'lever 19. By this means the pin 21 located on the bellcrank lever 22 has been raised, and the lever 22 thereby rotated a short distance, towards the left out of the position shown in Fig. 1, and the claw member 25, through the medium of the. fork 24, disengaged from the bevel wheel 5; The dobby, due to the engagement of the wheels, 7 andB, can now be rotated at will in either direction by means of the hand-crank 10, the bevel wheel 5 remaining in engagement [with the bevel wheel and ro'tat-ic g loosely upon the 6, and a turning movement of the dobby shaft 1 byone pick (one halfrevolution'ot this shaft) corresponding vto one revolution otthe hand-erank-ld;

When the dobby is to be coupled to the clutch described above.

complete I loom again the piI 12 .rs moved -ojut-ot the pushed back by means of the hand-crank 10.

The latter wheel, however, can only befcom pletely disengaged from the spur wheel 6 when the bevel wheel. mounted upon the.

shaft 6, assumes in relation to the clutch 'm'ember and therefore also to the shaft 6 exactlythe same position as at the instant.

rotation o. the bell-crank lever 22 into its previous position. By this means 19,18, 17 and 14 are then also prevented from returning into their initial positions shown in the drawing. In this manner a guarantee is given that the dobby, although it can be'released from the loom at any desired position, assumes exactly the same pothe parts sition in relation thereto at the instant the loom again.

when it is coupled with as it occupied at the instant of unclutching. If this position is not found after rotating the dobby by hand, it can. be sought for by rotating the hand-crank 10 to and fro, as the wheels 7 and 8 could not be brought out of engagement." Hence during the entire duration of the working of theloom and the dobby there is no moment 'at which the shaft 1 is n this constituting coupled through the bevel wheels 4 and 5 with the shaft 6, that is to. say with the. loom, and at the same time bythe wheels 7 and 8 with the hand-lever. The possibility of the hand-crank 10 being driven, and the danger that would arise therefrom, is therefore absolutely precluded, a further advantage of the driving apparatus described. Furthermore it is advantageous that the dobby can be actuated by hand by means of the same handcrank that serves for the opening and closing of the clutch.

In the above description it is assumed. that the dobby is driven from the upper loom shaft. .The drive may however be effected from the lower loom shaft. In this case the shaft 6 is driven in the ratio of 2:1 to the lower loom shaft, as the shaft 6 must revolve twice as fast as the lower loom shaft. Driving apparatus. of the kind described may be inserted between the shaft 6 and a shaft driving the latter instead of between the shafts 1 and 6, in which case the shafts 1 and 6 may be. in constant connection with one another. The clutch may be provided with two or' more pairs of claws instead of withonly one pair as What I claim is a 1. Hand and power driving device for pattern mechanisms, comprising a. power shaft, a shaft on the pattern mechanism, cams on this shaft for producing a reciprocating movement of pattern knives, a releasable shown and described.

clutch adapted to transmit power from the first to the second of said shafts, a gearing through which said cams may be driven in either direction by hand, a hand operated necting these two shafts, a pair of mutually engageable and disengageable transmission elements which do not mesh 'with'one another when the clutch is closed, a handcrank which is not in driving connection with rotating elements during working of the loom, but the releasable clutch member connected with and with one of said transmission elements in such a manner as to bring this element in engagement with the other when opening the clutch.

3. Hand and power driving device for pattern mechanisms as claimed in claim 2, comprising a. claw-clutch having one set of claws located on a wheel mounted loose upon the driving shaft and permanently connected with the pattern mechanism, the claws on one side of theclutch being dis-- posed with relation to that on the other side in such a manner that the pattern mechanism admits of being released from the loom in any desired'position, whereas it can only be recoupled in the same position relative to the said shaft.

4. Hand and power driving device for pattern mechanism comprising a driving shaft, a wheel rotatably mounted thereon and forming a clutch member, a shaft on the pattern mechanism, cams on said shaft for producing a reciprocating move ment of pattern knives, two wheels fix edly mounted on said shaft. one of thempermanently meshing with the wheel on the driving shaft, a hand operated driving wheel adapted to be brought in engagement with the second of said wheels on said shaft of the pattern mechanism, av clutch-member slidably mounted on the driving shaft to engage with the first-m'entioned clutchmember, a mechanism connecting this sec- 0nd clutch-member with said hand-operated driving wheel in such a manner thatwhen the hand-operated driving wheel is brought into engagement with the second of the said wheels fixedly mounted upon the shaft of the pattern mechanism, the slidable clutchmember is released from the other clutchmember and thereby the driving connection between said two shafts interrupted.

5. Hand and power driving device for pat tern mechanisms comprising a driving shaft, a shaft on the pattern mechanism, cams on said shaft for producing a reciprocating movement of pattern knives, gearing wheels on these shafts permanently meshing one with another, the gearing wheel on the driving shaft being loosely mounted thereon and provided with a clutching element, another clutching element axially slidable on the driving shaft but kept in constant radial relation thereto, said clutching elements being formed so as to enable their coupling only in the same relative radial position one with another as they assumed in the instant of unclutching, a second gear wheel rigidly connected with the shaft of the pattern mechanism, a mechanism connected with the slid- Y able clutching element-,a hand-crank and a members of a claw-clutch, a second bevel wheel which permanently meshes with said first bevel wheel and is mounted on the dobby shaft, a spur wheel fixed on this shaft, a

second spur wheel axially slidable upon its pivot, a hand-crank attached to this spur wheel, a rod gear connecting this second wheel with another member of the said clutch which member is axially slidable upon the driving shaft and rotating therewith, the breadth and axial travel of said second spur wheel being so dimensioned on the one hand in relation to the position and breadth of the co-acting wheel and on the other hand in relation to the length of the path of the slidable clutch member that, when the latter assumes the position which corresponds to the coin-- meneement of coupling, the two spur wheels are still in engagement with one another,

so that the other clutch member can be brought into the coupling position in case of need by rotating the hand-crank.

7. Hand and power driving device for pattern mechanisms com risin a drivin shaft,

two clutch members mounted thereon, one of these members rotatably mounted thereon and in permanent connection with a shaft of the pattern mechanism, cams on said, shaft for producing a reciprocating movement of pattern knives. the other clutchmember being axially slidable on the driving shaft, a claw member fixedly mounted upon this driving shaft and in permanent engage ment with "the slidable clutch-member to prevent it from rotation relatively to the driving shaft, a pressure spring interposed between the said two members and tending to bring the slidable clutch-member into engagement with that, clutch-member which acts upon-the dobby-shaft, a fork engaging with the slidable clutch-member, a handcrank loosely and slidably mounted on its pivot, a bell-crank lever connected on one side with said fork and on the'other side with the hand-crank in such a way that by axial displacement of the latter the slidable clutch member can'be disengaged.

8. Hand and power driving device for mechanisms, coniprising a claw clutch having an intermediate slidable mem-. her and an external member on each side pattern thereof one of these external members being rotatably mounted on its shaft-but prevented from sliding thereon, the other external member being fixed on the common shaft of the clutch, the intermediate clutch-member guided on and in permanentengagement with the lastmentioned external member, a bellcra'nlr-lever, one arm of whichis connected with said intermediate clutch member, a spur wheel slidable and rotatable on its pivot,a'rod and teeth gear connecting' this sour wheel with the second arm of said bell crank-lever, a shaft on the pattern mecha in in, cams on said shaft for producing-a reciprocating movement of pattern knives, a bevel wheel mounted'on said'shaft andmeshing with the first mentioned external clutch member, a spur wheel on the last mentioned siaft adapted to be engaged by thefirst mentioned spur wheel, means for limiting the axial displacement of this first spur wheel between two extreme postions and for locking the spur wheelin these positions'insii'ch I a manner that in one of these positions the two spur wheels mesh with one another and the said intermediate clutch-member is out of engagement with the rotatably mounted external member, whilst, when the slidable spur wheel is in its other extreme position and out of engagement with the other spur wheel, the rotatable external clutch inemoer is in engagement with the lnterinediate clutch-member and thus coupled with its v shaft.

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9. Hand and power driving device for pattern mechanisms, as claimed in claim 8, a rod connected to the hub of the hand lever and slidable spur wheel, a pair of toothed segments engaging with. one another, a rodv connecting one of these segments with said hub, a bell-crank lever connecting the other segment with the slidable member of the clutch. H v

10. Hand and power driving device for pattern mechanisms, comprising a handcrank slidably and rotatably mounted on its pivot, a spur-wheel rigidly attached to this hand-crank, a spur wheel fixed on a shaft of the pattern mechanism in the path of the axial displacement of the first spur wheel and adapted to mesh therewith, cams on said shaft for producing a reciprocating movement of pattern knives, a claw-clutch on the power shaft with one claw on each of the coupling faces, one ofthe members of this clutch being in permanent engagement with the shaft of the pattern mechanism, the other clutch-member slidably mounted on its shaft, a rod and lever mechanism adapted to be operated by the hand-crank and connecting this slidable clutch-member with the spur wheel attached to the hand-(- *ank, the axial dimension of the clutclrclaws being in such relation to the axial displacement of the slidably mounted spur wheel, that this latter is out of engagement withthe other spur wheel when the clutch is fully closed, but in engagement when the claws are in position just to come out of or into engagement one with another.

11. Hand and power device for pattern mechanisms, comprising a power shaft on the loom, a shaft on the pattern mechanism. cams on this shaft for producing a reciproeating movement ofv pat-tern knives, a releasable clutch inserted between said two shafts, a pair of mutually engageable and dlsengageable transmission wheels, not in engagement one with another when the clutch is closechone thereof mounted on the cam supporting shaft, a hand crank rigidly con nected with the other of said transmission wheels and adapted to bring it in and out of engagementwith the other wheel by axial displacement, gearing members connecting said hand crank with a releasable part of said clutch in such a manner that the hand crank in disengaging the clutch by a sliding the bevel WlIGGl D'IOUDtQd thereon with the power shaft, a hand-crank slidably and rotatably mounted. on its pivot, and stationary when the clutch closed, a rodand gear device connecting this hand crank with a member of the claw' being arranged to rotate with the power shat't but slidable thereon in axial direction so as to allow it to be coupled with and releasedfrom the bevel wheel loosely mounted on the power shaft, a spur wheel rigidly connected with the hand crank, another spur wheel fixed on the dobby shaft and adapted to be cngagedby the first mentioned spur wheel by an axial displacement thereof,

clutch, this member I the arrangement being such that these two spur wheels are in engagement one with another at the moment where the claws on the clutch members are just in position to come into or out of engagement one with another.

In testimony whereof I have aflixed my signature. I v

' HUGO sTAUBLI. 

